[Bug 8520] combobox dropdown area should be customisable

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=8520

[e-mail] changed:

What    |Removed                     |Added
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Attachment #6567 is|0                           |1
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------- Additional Comments From [e-mail]  2007-03-06 05:22 -------
Created an attachment (id=6581)
 --> (http://bugs.winehq.org/attachment.cgi?id=6581&action=view)
updated sample application actually reproduces the problem

I've noticed that the previous sample was flawed in many ways. (not static mfc,
requiring a dll, doesn't reproduce ANY of the problems).
So, this new sample reproduces 2 of the 3 problems.
I also noticed WHY the combo dropdown is buggy, it starts bugging when there
are enough elements to warrant a scrollbar. Only if there is a scrollbar, the
dropdown area shrinks back to 5 elements.